''Tetrapleurodon'' is a genus of lampreys that are

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsew ...

to the Lerma– Chapala basin in west–central

Mexico Mexico (Spanish: México), officially the United Mexican States, is a country in the southern portion of North America. It is bordered to the north by the United States; to the south and west by the Pacific Ocean; to the southeast by Guatema ...

. Both species are

threatened Threatened species are any species (including animals, plants and fungi) which are vulnerable to endangerment in the near future. Species that are threatened are sometimes characterised by the population dynamics measure of ''critical depensat ...

Species

There are two recognized species in this genus according to

FishBase FishBase is a global species database of fish species (specifically finfish). It is the largest and most extensively accessed online database on adult finfish on the web.

. They are sometimes included in the genus '' Lampetra'' instead. * '' Tetrapleurodon geminis''

Álvarez Álvarez or Álvares may refer to: People *Álvarez (surname), Spanish surname Places *Alvares (river), a river in northern Spain * Alvares (ski resort), in Iran *Alvares, Iran * Alvares, Portugal *Álvarez, Santa Fe, a town in the province of Sa ...

, 1964 (Mexican brook lamprey) * ''

Tetrapleurodon spadiceus ''Tetrapleurodon'' is a genus of lampreys that are endemic to the Lerma– Chapala basin in west–central Mexico. Both species are threatened. Species There are two recognized species in this genus according to FishBase. They are sometimes in ...

'' ( T. H. Bean, 1887) (Mexican lamprey)

References

Petromyzontidae Fish of North America Jawless fish genera {{jawless-fish-stub